What kind of mileage are you guys getting with your 6.2/6.5s?

My 84 K10 SWB 6.2/700R4/3:42/29" tire gets 22 highway, that was before straight pipes. I'll make a trip soon and see what I get with straight pipes. All stock except for some noise!

 

i get 14 MPG but thats with oversized tires and me driving it like i stole it

 

Best i get is about 16 mpg on the highway. Might be able to push 17 down a hill .

3.73s, 285/75R16 MudTerrains and yadda yadda yadda

 

I get bout 14 or 15 prolly get better if my crossover pipe wasn't leaking

 

i get 15 city and 20~22 highyway, driving it like i stole it.
when i drive like grandma i get 17 city and 25 highyway.

my mods are k and n airfilter mntd directly on the turbo, 4" straight pipe to 6" stacks, bigger tranny cooler lines, and a bigger coolant line coming off of the heater core and a bigger inlet on the thermostat housing for equal cooling, a moroso valve cover breather (got rid of the stock flexy tube thing when i put on the kn) 265/75/16 tires inflated to: f=60 & r= 68psi

on the highway i cruise 70mph @ 2500rpm.

 

Oh I forgot, I drive mine like a stole it as well, my foot only lets up when I go 10 or more over the limit.

 

i have not filled up recently so i bet they have switched the winter diesel with the regular. i have not driven hardly at all with my truck so i bet i will get better with the regular diesel